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andesite
(redirected from Andesitic)

   Also found in: Encyclopedia, Wikipedia 0.01 sec.
an·de·site  (nd-zt)
n.
A gray, fine-grained volcanic rock, chiefly plagioclase and feldspar.

[After the Andes.]

andesite [ˈændɪˌzaɪt]
n
(Earth Sciences / Geological Science) a fine-grained tan or grey volcanic rock consisting of plagioclase feldspar, esp andesine, amphibole, and pyroxene
[from Andes + -ite1]

andesite  (nd-zt)
A gray, fine-grained volcanic rock. Andesite consists mainly of sodium-rich plagioclase and one or more mafic minerals such as biotite, hornblende, or pyroxene. It often contains small, visible crystals (phenocrysts) of plagioclase. It is the fine-grained equivalent of diorite.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.andesite - a dark grey volcanic rockandesite - a dark grey volcanic rock            
igneous rock - rock formed by the solidification of molten magma


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The geological mapping program has identified a rock sequence consisting of andesitic and dacitic volcanics intruded by microdiorite and quartz monzonitic stocks in an extensional environment typical of Nevada's Basin and Range geological province.
Mineralization is hosted within a central andesitic volcanic complex.
A series of mineralized quartz latite dikes that has intruded the basal andesitic volcanic units is known to host silver mineralization over a wide zone that extends into the Montecristo III concession.
 
 
 
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